{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-29035 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2026-29035 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-29035 is a high-severity memory corruption vulnerability in civetweb, published on 11 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-29035 and fix it if it is affected.\n\nWhat it is: CVE-2026-29035 is a high-severity memory corruption vulnerability in civetweb, published on 11 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-29035 in the wild and no public exploit code.\n\nAffected product: civetweb. No package-level version data is available, so check the vendor advisory linked from the reference page.\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2026-29035/ (Markdown: https://insights.sbomify.com/CVE-2026-29035/index.md)","id":"CVE-2026-29035","markdown":"https://insights.sbomify.com/CVE-2026-29035/index.md","name":"CVE-2026-29035","record":{"aliases":["DEBIAN-CVE-2026-29035","GHSA-xvrx-cw3m-h23c"],"analysis":{"component_type":"server_software","fix_type":"patch","impacts":["code_execution","denial_of_service"],"network_reachable":"yes","non_default_config":true,"product_category":"CivetWeb web server","requires_auth":"none","summary":"Unauthenticated attackers can trigger heap or stack buffer overflows in CivetWeb via crafted WebSocket frames, potentially leading to code execution or denial of service.","user_interaction":"not_required","vuln_class":"memory_corruption"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"VulnCheck","cpe":[],"cvss":{"score":8.3,"severity":"high","source":"cna","vector":"CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N","version":"4.0"},"cwes":[{"id":"CWE-787","name":"Out-of-bounds Write"}],"description":"CivetWeb (commit 4a4f0c95) contains a heap and stack buffer overflow vulnerability in the read_websocket() function that allows unauthenticated remote attackers to corrupt memory by sending compressed WebSocket frames when both USE_ZLIB and MG_EXPERIMENTAL_INTERFACES are defined. Attackers can negotiate permessage-deflate during the WebSocket handshake and send a crafted frame with the RSV1 bit set, causing the server to write a 4-byte zlib sync trailer out-of-bounds past the allocated buffer, leading to heap metadata corruption, denial of service, or potential code execution.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":false,"headline":"CivetWeb Heap/Stack Buffer Overflow via WebSocket permessage-deflate Decompression","id":"CVE-2026-29035","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"memory_corruption","year":"2026"},"n_packages":0,"n_references":2,"next":{"headline":"cJSON 1.7.19 Wrong-Key Modification via JSON Pointer Escape Decoding","id":"CVE-2026-29036"},"packages":[],"prev":{"headline":"This CVE ID has been rejected or withdrawn by its CVE Numbering Authority.","id":"CVE-2026-29034"},"products":["civetweb"],"published":"2026-08-11","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"no","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-08-14","vendors":["civetweb"]},"summary":"Unauthenticated attackers can trigger heap or stack buffer overflows in CivetWeb via crafted WebSocket frames, potentially leading to code execution or denial of service.","url":"https://insights.sbomify.com/CVE-2026-29035/"}